HP is recalling thousands of laptop batteries after two machines overheated and caught fire.
Although no one was injured it is clearly not comfortable, or safe, having a flaming lappie on your lap. The lithium-ion batteries were in HP or Compaq branded machines sold between August 2007 and March 2008.
About 70,000* batteries …

Nuclear is the answer

We need to look at installing nuclear generation packs into portable devices! Imaging never having to recharge ever again... with one proviso.... laptops should no longer be used on your "lap" unless you wish to become sterile.